EP2845565A2 - Zahnprothese auf Implantat, die ein Gerüst aufweist, das mindestens einen künstlichen Zahn hält, und Herstellungsverfahren einer solchen Prothese - Google Patents

Zahnprothese auf Implantat, die ein Gerüst aufweist, das mindestens einen künstlichen Zahn hält, und Herstellungsverfahren einer solchen Prothese Download PDF

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Publication number
EP2845565A2
EP2845565A2 EP20140183440 EP14183440A EP2845565A2 EP 2845565 A2 EP2845565 A2 EP 2845565A2 EP 20140183440 EP20140183440 EP 20140183440 EP 14183440 A EP14183440 A EP 14183440A EP 2845565 A2 EP2845565 A2 EP 2845565A2
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EP
European Patent Office
Prior art keywords
teeth
tooth
artificial
armature
prosthesis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP20140183440
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English (en)
French (fr)
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EP2845565A3 (de
Inventor
Sébastien Moreau
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Arcadia
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Arcadia
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Publication date
Application filed by Arcadia filed Critical Arcadia
Publication of EP2845565A2 publication Critical patent/EP2845565A2/de
Publication of EP2845565A3 publication Critical patent/EP2845565A3/de
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/10—Fastening of artificial teeth to denture palates or the like
    • A61C13/1003—Fastening of artificial teeth to denture palates or the like by embedding in base material
    • A61C13/1006—Fastening of artificial teeth to denture palates or the like by embedding in base material characterised by a tooth shape which improves retention
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/10—Fastening of artificial teeth to denture palates or the like
    • A61C13/1003—Fastening of artificial teeth to denture palates or the like by embedding in base material
    • A61C13/1013—Arch forms
    • A61C13/1016—Methods or apparatus for mounting, holding or positioning a set of teeth

Definitions

  • the present invention relates to a dental prosthesis implant consists of a frame now holding at least one artificial tooth.
  • the invention also relates to a method for producing a prosthesis using such teeth.
  • a dental prosthesis is a device intended to replace, in a human being, one or more teeth when the one (s) is (are) absent (s) or deteriorated (s).
  • Implantology is a particular technique that involves the replacement of one or more teeth with artificial tooth (s) covering an armature matching the dental arch, the artificial tooth or teeth (s) ( s) being attached to one or more dental implant (s).
  • a dental implant is an artificial root, usually made of titanium or a titanium alloy, permanently inserted into the maxillary or mandibular bone.
  • maxillary refers to the upper dental arch and the mandibular term to the lower dental arch.
  • the two arches that is to say the maxillary and the mandible, together define the jaw of a human being or an animal.
  • the technique of implantology allows to reproduce, as faithfully as possible, the dentition of the patient by combining the aesthetic aspect and the functional aspect of the fact that this type of prosthesis is close to the structure of the implant.
  • An artificial tooth is generally made of ceramic, artificial resin or a composite material based on polymers, ceramics or other materials known per se.
  • the method of making such a prosthesis is based on a plaster model which constitutes the exact replica of the patient's mouth with implants. On this replica, we position prefabricated artificial teeth that correspond to the missing teeth, in terms of dimensions, shapes and colors. Silicone molding of the teeth in position forms a mounting key.
  • This key makes it possible to produce a framework for holding a prosthesis on the dental arch concerned.
  • This frame follows the contours of the prosthesis mounting area on the dental arch by ensuring optimal placement of the artificial teeth and allowing jaw movements identical to those performed with a natural dentition, especially in terms of chewing. .
  • a dental implant prosthesis no longer has a means of assessing the pressure it exerts on the prosthesis, due to the absence of a natural tooth Thus, the person tends to exert maximum pressure with his artificial teeth during chewing movements.
  • a dental prosthesis must have a higher mechanical strength than natural teeth and be of a precise construction. For this, it is necessary to avoid having too much or not enough spacing between the artificial teeth and the frame that carries them.
  • the cosmetic material that is to say the material constituting the visible part of the implant prosthesis, must be mechanically supported at each dental cusp. The frame, meanwhile, must follow as precisely as possible the geometric configuration of each tooth to be replaced while leaving an optimal space to the chosen cosmetic material.
  • the subject of the invention is a dental implant prosthesis consisting of an armature holding at least one artificial tooth which is fixed on an implant and which comprises an open cavity on its palatal face and at least one cutout formed in least one face, called proximal, of the tooth, characterized in that said cutout defines a continuous passage between the cavities of two adjacent artificial teeth whose cutouts are opposite and in that, in this configuration, the cavities and the cuts of two adjacent teeth together define a housing for receiving a portion of the material constituting the armature when said artificial teeth are in position on the armature.
  • the figure 1 represents an artificial tooth 1 according to the invention. Unless otherwise mentioned, the term tooth will preferably be used later to designate an artificial tooth.
  • tooth 1 illustrated in figure 1 is a premolar, it being understood that all types of teeth, namely canines, incisors, premolars and molars, are made in a similar way, in accordance with the invention, whatever the size and / or the hue of the teeth, that they are intended for an adult or a child, or even an animal.
  • the tooth 1 is made of a material having aesthetic characteristics similar to those of natural teeth.
  • it is ceramic, resin or composite.
  • it is nano-composite or other material, known per se, which provides an artificial tooth close to the corresponding natural tooth.
  • An artificial tooth 1 comprises an open cavity 2 on a face 3, called the palatal face, of the tooth 1, that is to say a cavity 2 open on the face 3 of the tooth 1 intended to be resting on the armature 4 of the prosthesis 5 as illustrated in FIG. figure 6 .
  • the face 6, called the occlusal face, opposite to the palatal face 3, is intended to be opposite the other dental arch. It is of an aspect close to the free face of the natural tooth that the artificial tooth 1 must replace.
  • This face 6 is provided with an orifice 7 of shape and dimensions adapted for the passage of a fixing screw of the tooth. prosthesis 5 in the dental arch of the patient. This orifice 7 is visible at figure 5 .
  • the dimensions of the cavity 2 are adapted to the nominal dimensions and the shape of the tooth 1 as well as to the chosen material.
  • the volume of the cavity 2 also takes into account the position and / or the function of the tooth 1.
  • the volume of the cavity 1 is also adapted to the constraints of fixing the tooth on the frame, these constraints being governed by the function of the tooth and therefore by the mechanical strength that the latter must present.
  • the cavity 2 of each tooth 1 is devoid of counterpane.
  • a cutout 9 is formed on at least one face 8 of the tooth 1, said proximal face and intended, for example, to be facing a similar face 80 of another artificial tooth 1 when two artificial teeth are adjacent.
  • This cutout 9 has a rounded bottom and a shape adapted to the morphology of the tooth concerned.
  • the cutout is generally configured in U.
  • the opening 10 of the cutout 9 is located on the palatal face 3 of the tooth 1.
  • the rounded bottom 11 of the cutout 9 is close to the occlusal face 6 of the tooth 1
  • the edges 12, 13 of the cutout 9, that is to say the branches of the U, form an open angle, making it possible to avoid, in all cases, an undercut. In the example, the angle is about 6 °.
  • Such a configuration makes it possible, when at least two artificial teeth 1, 100 are adjacent on the same dental arch, to define a continuous passage between the teeth. respective cavities 2, 200 of the teeth 1, 100. Given the dimensions and the geometric configuration of the openings 10, the cutouts 9 and the volumes of the cavities 2, 200 of the artificial teeth 1, 100 when they are close together, we define a housing receiving a portion of the frame 4 distributed over at least two teeth 1, 100.
  • each tooth 1, 100 form, de facto, an aesthetic coating of the frame 4, imitating a natural dentition. It is the frame 4, also called bridge, which, by its configuration and continuity between the teeth 1, 100, ensures the mechanical and functional characteristics of the assembly.
  • the armature thus has a configuration that is perfectly adapted to the teeth mounted on the prosthesis, since the material constituting the armature optimally occupies the housings defined by the cavities and the passages between adjacent teeth. A homogeneous reinforcement is obtained, without structural weakness, the inter-dental spaces being determined, de facto, by the recesses formed by the cavities and the cuts of the neighboring teeth.
  • a single cut 9 may be provided, if necessary, in the face proximal 8 or 80 of artificial tooth 1 or 100.
  • teeth 1, 100 is carried out, advantageously but not exclusively, from artificial prefabricated teeth known and marketed with a cavity 2, 200.
  • the teeth objects of the invention are advantageously made in the factory the teeth are then delivered ready for use. Alternatively, they are custom-made on site, for example by a dental technician.
  • the teeth are made by molding or by other techniques known per se.
  • the figure 2 illustrates a working model 14 partially reproducing the mouth of a partial toothless patient.
  • it is a working model reproducing a maxillary, that is to say, an upper dental arch.
  • Implants 16 identical to those which will be or are in place in the maxillary of the patient, are fixed in the edentulous zone 15, in a position representative of that occupied by the implants 16 in the maxilla of the patient.
  • the free end 17 of each implant 16 protrudes from the surface 18 of the edentulous zone 15.
  • Each end 17 is hollow and provided with a tapping.
  • Hollow tubes 19, here in transparent polymer, are releasably screwed onto the free ends 17 of the implants 16.
  • the volumes of the tubes 19 define a passage for fastening screws, not shown, of the prosthesis 5, namely the assembly formed by the armature 4 and the teeth 1, 100, in the maxillary of the patient.
  • each tooth 1, 100 is chosen according to the natural tooth that it must replace.
  • the positioning of the teeth 1, 100 is such that each tooth 1, 100 is on the free end 20 of a tube 19 itself positioned on the free end 17 of an implant 16.
  • the orifice 7 of the upper face 6 of each tooth 1, 100 is opposite the free end 20 of the tube 19.
  • the teeth 1; 100 are positioned so that their proximal faces 8; 80 provided with the cutouts 9 are facing.
  • the cutouts 9 provide a passage between the cavities 2; 200 of the neighboring teeth.
  • the cavities 2; 200 and the cutouts 9 of the teeth 1; 100 define a receiving housing of the material constituting the armature while defining the inter-dental spaces, as it appears in FIG. figure 4 .
  • the interdental spaces are optimized.
  • the inter-dental spaces must be large enough to have a natural appearance, avoiding the one-piece appearance of several teeth 1, 100 side by side.
  • the inter-dental spaces should not be too large not to show the armature 4 in the inter-dental space and to maintain a high mechanical strength of the prosthesis 5.
  • a representation of the teeth 1, 100 is then made.
  • a molding is carried out using a material known per se such as silicone, teeth 1, 100 and a part of the model 14.
  • This molding 21, made from the face external maxillary, is called vestibular key.
  • another molding is performed.
  • This second molding covers the entire working model 14, so the arcade on all sides, inside and outside.
  • This second molding, not shown, is a second key.
  • This second key is used for the realization of the prosthesis 5 according to another embodiment, the artificial teeth 1, 100 of the prosthesis 5 then being in a different material from that used for the artificial teeth 1, 100 used to perform the molding of the vestibular key 21.
  • the representation of the teeth in place is made by 3D scanning.
  • the key 21 When the key 21 is made, it is separated from the working model 14.
  • the teeth 1, 100 are removed individually from the model 14 and cleaned before being placed in their respective fingerprints 22 in the key 21, as illustrated in FIG. figure 3 .
  • a suitable filler material For example, it is a photopolymerizable resin known per se.
  • the set is then replaced, namely the vestibular key 21 with the teeth 1, 100 in place and the cavities 2, 200 and the cutouts 9 filled by the filling resin, on the working model 14.
  • the filling is completed, for example with the same resin, zones devoid of resin and the filling is adjusted, in particular at the periphery of the tubes 19.
  • the vestibular key of the model 14 is removed with the teeth.
  • the presence of the cutouts 9 on the proximal faces 8, 80 of the teeth 1, 100 allowed the resin to optimally fill the inter-dental spaces, forming a bridge connecting the cavities 2, 200 of the teeth 1, 100. it is no longer necessary to resume or retouch the armature model, the latter being, de facto, optimal when the filling material has hardened.
  • the final reinforcement 4 is made.
  • This step is achieved by the implementation of techniques known per se, for example by the technique of lost wax, by the manufacture by CAD after scanning the model 23 and a model or by another known technique.
  • the reinforcement can be made by CAD / CAM, from virtual computer representations of the cavities of the teeth concerned. These representations are integrated into the CAD file from 3D scans of the teeth made by techniques known per se.
  • the CAD file includes, de facto, the shape and the dimensions of the cavity of the tooth, that in negative. It is then possible for this file to serve as a matrix for making the reinforcement by CAD.
  • such a file incorporates the final treatment and thus adapts, depending on the material selected, the space between the teeth to the final treatment.
  • the armature model 23 is made in a simple manner, minimizing errors and without requiring a high technical qualification since the part of the armature 4 located between two teeth 1, 100 is simply performed. by injecting the filling material into the cavities and the cuts of the teeth, the latter occupying all the space available during molding.
  • this part of the model 23 corresponding to the part of the frame 4 called bridge is made with a quantity of material sufficient to ensure the strength of the prosthesis and without the material constituting this bridge is visible on the finished prosthesis.
  • An additional step, known per se, of manufacturing the prosthesis 5 is to put in place permanent artificial teeth, which are commonly referred to by the term "cosmetic material" on the armature 4 previously made. It is, for example, resin teeth, such as those 1, 100 previously used, which are placed on the frame 4.
  • FIG. 24 is made of "traditional" ceramic on the armature 4. Due to the precise conformity of the armature 4 with the anatomy of the patient's mouth, in particular spaces between the armature 4 and the teeth. as well as the inter-dental spaces, it optimizes the control of the retraction of the dental ceramic constitutive teeth 24 during assembly of the prosthesis, which induces a better distribution of mechanical stresses, that with inter-dental spaces better drawn and of a more natural appearance.
  • a key of total recovery of the arch is used, that is to say a molding of the two faces of the arch as described previously, for defining a mold into which an injection wax is introduced, by at least two holes previously pierced in the key.
  • a pressure ceramic injection device known per se, is used to produce the pressed ceramic teeth.
  • the invention makes it possible to manufacture, at a controlled cost and quickly, a dental prosthesis reinforcement on implants, with optimal mechanical strength.

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  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dental Prosthetics (AREA)
EP20140183440 2013-09-05 2014-09-03 Zahnprothese auf Implantat, die ein Gerüst aufweist, das mindestens einen künstlichen Zahn hält, und Herstellungsverfahren einer solchen Prothese Withdrawn EP2845565A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1302056A FR3009948B1 (fr) 2013-09-05 2013-09-05 Dent artificielle adaptee a la realisation d'une armature de prothese dentaire sur implant et procede de realisation d'une telle armature

Publications (2)

Publication Number Publication Date
EP2845565A2 true EP2845565A2 (de) 2015-03-11
EP2845565A3 EP2845565A3 (de) 2015-04-08

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EP20140183440 Withdrawn EP2845565A3 (de) 2013-09-05 2014-09-03 Zahnprothese auf Implantat, die ein Gerüst aufweist, das mindestens einen künstlichen Zahn hält, und Herstellungsverfahren einer solchen Prothese

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EP (1) EP2845565A3 (de)
FR (1) FR3009948B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015104394B4 (de) * 2015-03-24 2020-06-04 Kulzer Gmbh Verfahren zur Herstellung einer Teil- oder Totalprothese sowie Prothese erhältlich nach diesem Verfahren

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1062916A2 (de) 1999-06-21 2000-12-27 DCS Forschungs & Entwicklungs AG Verfahren zur Herstellung eines individuell gefertigten, implantatgestützten Zahnersatzes und Verfahren zur Herstellung eines Zahnersatzteiles, insbesondere aus beliebigen, auch biokompatiblen Werkstoffen und insbesondere mit Hilfe der CAD-CAM-Fräs- und Schleif-Technik
WO2004078060A1 (de) 2003-03-04 2004-09-16 Merz Dental Gmbh Verfahren zur herstellung einer zahnersatzprothese und kunstzahn dafür
EP1568335A2 (de) 2004-02-24 2005-08-31 Cadent Ltd. Verfahren und System zum Entwerfen und Herstellen von Zahnprothesen und Zahnspangen
WO2011066895A1 (de) 2009-12-04 2011-06-09 Heraeus Kulzer Gmbh Herstellung individueller dentaler prothesen via cad/cam und rapid manufacturing/rapid prototyping aus daten der digitalen abdrucknahme
WO2011091382A1 (en) 2010-01-22 2011-07-28 Precision Through Imaging, Llc Dental implantation system and method

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US200284A (en) * 1878-02-12 Improvement in artificial teeth
US628345A (en) * 1897-12-10 1899-07-04 Henry James Miller Artificial tooth.
FR628698A (fr) * 1926-08-04 1927-10-27 Ohio Chemical & Mfg Co Perfectionnements aux moules servant à la fabrication des dentiers en bakélite
US2095535A (en) * 1936-02-11 1937-10-12 Merrill G Swenson Artificial tooth
US2301825A (en) * 1941-11-27 1942-11-10 Universal Dental Company Artificial tooth
FR1439545A (fr) * 1965-06-30 1966-05-20 Dow Corning Prothèse dentaire souple

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1062916A2 (de) 1999-06-21 2000-12-27 DCS Forschungs & Entwicklungs AG Verfahren zur Herstellung eines individuell gefertigten, implantatgestützten Zahnersatzes und Verfahren zur Herstellung eines Zahnersatzteiles, insbesondere aus beliebigen, auch biokompatiblen Werkstoffen und insbesondere mit Hilfe der CAD-CAM-Fräs- und Schleif-Technik
WO2004078060A1 (de) 2003-03-04 2004-09-16 Merz Dental Gmbh Verfahren zur herstellung einer zahnersatzprothese und kunstzahn dafür
EP1568335A2 (de) 2004-02-24 2005-08-31 Cadent Ltd. Verfahren und System zum Entwerfen und Herstellen von Zahnprothesen und Zahnspangen
WO2011066895A1 (de) 2009-12-04 2011-06-09 Heraeus Kulzer Gmbh Herstellung individueller dentaler prothesen via cad/cam und rapid manufacturing/rapid prototyping aus daten der digitalen abdrucknahme
WO2011091382A1 (en) 2010-01-22 2011-07-28 Precision Through Imaging, Llc Dental implantation system and method

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Publication number Publication date
FR3009948A1 (fr) 2015-03-06
FR3009948B1 (fr) 2016-05-13
EP2845565A3 (de) 2015-04-08

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